Telegraphic system



Jan. 20, 1931. A. LERY I TELEGRAPHIC SYSTEM Filed March 2'7, 1929 4:1 Tys- 1 H g 1d 3 F H wb/ L E fl/ el /////H/J/ W v 1 a 1 M5 fi mww V g A distributor.

. once, and it is necessary that m be greater than n.

' 7 When three correction signals are stored up before causin thein'to act on the correcting devices, the speed of the corrected In Fig.1, thecorrection. contact is're pre sented by 10. i The brushes of the distributor at 'therec'eiving station, which turn in the direction of'the arrow, occupy, after correc tion,'the position a,-r-after. t he first revo lution the position 1), and after the second revolution the position 0. The correction currents-transmitted at each revolution [of f the brush at the transmitting station remain inactive,since the brushes of the; receiver have not yet reachedthe contact 10.

in-accordance with the invention, the 'im- 11 ered );to be effective. The first correction rection by returning the'brushes to the poa sition a, thatis to say displacingithem} .backwardsthrough the angle a. r a The apparatus which will be described s arranged so that the corrfection' can onlybe produced by a succession of three :consecu- V tive impulses. r Therefore, ifa parasite cur-'5 rent arrives at" the correction contact,,the,

chances that another parasite-will arrive at the following revolution are verysmall, and

disturbances will not be produced. It would be just the same, however, if a parasite ar-- rived twice in succession at' the correcting 5 contact, since the correcting electro'magnet three times in succession. I a ,p

' The/arrangement for protecting the correction apparatus which operates according to the above principles,that istosay', which operates the correcting .electromagnet when the correction current arrives on thfl correction contact during threesuccessive revolutions of the "brushes, maybe realised in the I following manner. 7

j to

Onthe same base '(Fig. 2) are grouped three electromagnets 1, 2 and 3, and the com-i ".mutation'devices which control their armatures; T

, The telegraphic currents (if, the wireless telegraphic station arrive atthe terminals by the spring 19, can occupy o' r-After thQ-third revolution, these-"brushes occupy the Positiontd. V The local circuit ofthecorrection system is then closedbut,

"pulsegtransmiss'ion must be made' several, timesf-(-three t mes1n the exam l cns'1dis only influenced when the current arrives 18. Thecorrection currents, coming from the correction contact 10, actuate theelectromagnet l when the commutator 6 is at rest, butthey are directed towards the correcting electroma 'nct 4: when-the commutator 6 is displaced 'y the notched mat: The electromagnets 2 and 3am aciuated, either one or the. other, by. a local current transmitted at eafchrevolution by the brush of the ring '1 of thedlstributon iTheconnnutator directs the local current either towards the electromagnet 2,01 towards the electromag- 'net' 3;" I

The armaturesof the electromagnets l and 2 are mutually lockedby the detents i2 and 13, so that each remains in the a'itracted'vposltion until the'otherhas-operated in its turn,

' 3A notched rod 7, urged towards the right three positions A'deten-t 8, fi2 ied to the armature 14 of the electromagnet 2, pushes the rod'anfd causes it inthe longitudinal direction. 7 1 a to advance one" notch from-rights to left each time the. electromagnet 2 is operated. The

armature of the. electromagnet 3 carries an extensionflr which operates as 'a jretaining catch for thezrod; In the position of rest, it is maintained in position on the notch on which theaction-of the armature of the electromagnet 2 has: placed it. 'When it isoperated by 1 its :electromagnet 3, it releases the rod'whichith'en returnsto its initial position towards the spring 199 n v f The detent'S is represented in Fig. 3.

intermediat'efposition, jby the counterweight ll and byla spring'QO, l

The actiono'f the 'arran' e-nient is easil un r t a a J derstood. During the periods when the correctionicontact 10'sendsfno current, the col rectlofn apparatus s notifoper ated. The elecr tromagnet 2,,liavjng been actuated'once by the-regular ,currentcoming from the, contact 11 ofltheiloc al circuit, .keeps its armature in It is displaced between two' fixed stops l5'and 16, engagement with which causes its left eXtre1n-- itytofbe lowered. *Thislatter is raised, in

right pushed by the helical theatt'raeted position, locked by the armature of the electroinagnet '1 which isnot excited. 7

At the following revolutions, the regular current'of the contact ll'is directed by the coinmutator 5 towards the Ielectromagnet 3, the

- armature of; whicli 'is periodically operated and disengages therod 7 which returns to its initial position towards the right.

If a correcting 'current norlnal or parasltic appears, 1t is directed b y, the commutator 6 toithe electromagnet 1. This latter,

' in attracting its armature, unlocks thearma 'ture of theelectromagnet 2 which is iinme diately set in movement by the local. current coming from the contact 11 and which causes. the rod7; to advance one notch towards the tion adapted to correct said corrected distributor in accordance with the correcting signals-to keep. the correcting andxcorrected distributors running in synchronism, and an trrangement for preventing theoperation of the correcting mechanism unlessa plurality of correcting signals are received at consecu tive correcting IGCBPtlOIlS of-said corrected distributor..

4. A telegraph system as claimed in'clairn 2 wherein the arrangement is interposed be 1 tween the correction contact of the corrected I distributorand the correcting mechanism.

to I

15. A telegraph system comprising the combination of a transmitting station and a receiving station, a'correcting distributor at said transmitting station to periodically transmit correcting signals, a rotaryvcorrected dlStIlblltOI at said receiving station, .a

correcting mechanism at said receiving .-station adapted to operate in accordance j with V said correcting-signals to keep the two-distribu-tors' in synchronism, a correction contact on saidfcorrected distributorwhich is said correcting mechanism to .prevent theconnected 'to said correctingi'mechanism and causes the operation. of the COIfIOCtIIIg mGCIianismsif a correcting: signal arrives when the brushes of the ;-corrected distributor are on thiscontact, and anarrangement interposed between said QIIBCt10IlCOI1t&Ct/ B.Ild

operation of the correcting mechanism'unless 1a correcting signal is received at several con-v secutive revolutions of the corrected distributor. i f 5; a i

6; A telegraph systemcomprisingthe combin'ation' of atransmitting xstation and a re:v ceiving station a correcting distributor 'a-tr said transmitting station to periodically transmit correcting signals, a; rotary; cor,-

rected distributor at-said receiving station,

' a correcting mechanism at'saidi receiving and causes the operation of 'thecorrecting, mechanism' if a correcting signal arrives 5O signal is stations to periodically transmitcorrecting.

station adapted to operate in accordance with said correcting signals to? keep the'two distributors" in synchronism, a i correctioncontact ong said correcteddistributor-whichis connected to said correcting mechanism when thebrushes of the corrected distributor are on thiscontact, and an arrangement in- 7. In a' telegraph system" comprising a transmitting station and a receiving station, a correcting. distributorjwat saidtransmitting signals, a rotary corrected distributor i at said :Vreceiying station,wrand a correcting" mechanism at said receiving station adapted tofcorrect said corrected distributor in accordance-'wlth the received correcting slgnals, means'for preventing'the operation of thecorrecting,Inechamsm by means of parasite; impulses comprising an arrangement for preventing the operation of saidscorrecting, mechanisrn' unless an impulse is received atseveral consecutive revolutions of the corrected distributor.

"8', A telegraph system as claimed in claim 7, iwherein the correcting mechanism can only operate if an im ulse is received at three consecutive ,revo utions of the corrected distributor and wherein. if, at the third revolution, an impulse does not arrive,

the arrangement is restored to its normal 190- SltlOIl .and requires three more 1mpulses at consecutive'revolutions or the corrected distributor to operate it., 9. Inca telegraphic system in recting signal is periodically sent to keep the transmitting and receiving devices in syn-- chronism, an arrangement for preventing the operation of the correcting apparatus by parasiteimpulses comprising the coniwhich a cor-V bination of two electromagnets whose arnia-' turesare adapted to bemutu ally locked so that'when either of saidarmatures is in the attracted position itis locke'd in said position bythe other of said armatures'until said other armature has beenjattracted infturn,

means'for operating'the first electroinagnet by 3the received impulses,'means for periodically operating the second electromagne't by alocal current, a rod member adapted to be moved-step step in accordance with the movements o :thearmature of said second electromagnet, a third electromagnet, a cornmutatorfor openin'g the circuit of said second electromagnet when its armature is attracted; and diverting said local-current through saidthird electrom'jagnet, and avcon1- V ,mutatorl for opening the circuit of said first electromagnet when said rod member has ex-l ecuted, a -predetermined number of steps, 7'

and diverting said received impulsesthrough the correcting mechanism, said third eiectrov magnet operating ,7 subsequently to restore the arrangement to its, normal position, whether an impulse has been received or not.

10. In atelegrapli system in Which'correct- Y ing signals areperiodically sent, to keep the transmitting and receiving devices, in synchronism, saidtransmitting and receiving devices'comprising rotary d stributors, an arrangement as..cla1med;1n claim 9, wherein means are providedlfor operating the second i electromagnet by a local current at each revolution of the receiving distributor, and where,

erate at the revolution ofsaid receiving distributor immediately following the diverting of the correcting impulses through the correcting mechanism; torestore-the arrange i in the third electromagnet is adaptedto opmerit to its normal position- Wliei'ihi an 'imnlse has been received or not;

.111. Ina telegraph system comprisingithe;

combination of a'otransmitting'station and a receiving station, acorrecting distributor at 1" said transmitting station adapted to per odically transmit eorrectingsignals, a correcteddistributor at said receiving'station, acorrectr' mitting' Q i w the operation of said 'cor m h ing" Inechanismadapted tojcorrect' said corrected distributor in amrdanc withthe cor-,

recting signals transmitted from said trans- I station, and means 'for prevent ng A by means of parasite impulses, said means oomprisingan arrangement whereby theops i eration of said correctingmechanism s p're-v Q 7 ventedunless a plurality of'correcting slg- I nals are'receivedat regular intervals of time.

12. telegraph system'comprising" the -1' combination of a transmittingstation and a V receiving station, a correct ng distributor'at v said transmitting stationi adapted to'peri0d; V

7 ically transmit; correcting signals, a rotary distributor at L as we 4 nism at said receiving station, a correcting mechanism adapted to correct sa d rotary f to be maintainedhjsubstantially in synchro- 'nism With said correctingv distributor at-said transmitting station by means of a correcting mechanism at saidreceiving-station, a correcting mechanism adapted to correct saidrotary distributor in accordance Withthejcorrectingsignals transmitted from said trans mittin'g station, and. means" for preventing the operation of said correcting mechanism signals are 7 received at consecutive revolutions ofsaid rounless a plurality ofcorrecting tary distributor.

13. A telegraph system comprising the combination of atransmitting station and a1 receiving station, a rotary distributor at said 1 transmitting station adapted to periodically transmitcorrecting signals,a'rotarydistribm- 5 tor at said receiving station adapted tcjbe maintained substantially in: synchronism With said'rotary distributorat said transmit;

ting stationbymeans of a correctingmeChadistributor at said receivingstation in accord from said transmitting station,fand an ar operationof said correcting mechanis'm unless a plurality'ofcorrecting signalsare re; 7, celved at consecutive revolutlons ofsaidre- I a ceivingjdistributor.

f In testimony Whereof I have hereunto afa f l am]; my.

fixed my signature.

said receiving station'adapted s j 

